Mercurial > hg > truffle
annotate src/share/vm/oops/klassKlass.cpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | d25d4ca69222 e5383553fd4e |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1155
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1155
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1155
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "gc_implementation/shared/markSweep.inline.hpp" | |
| 27 #include "gc_interface/collectedHeap.hpp" | |
| 28 #include "gc_interface/collectedHeap.inline.hpp" | |
| 29 #include "memory/oopFactory.hpp" | |
| 30 #include "memory/permGen.hpp" | |
| 31 #include "oops/constantPoolKlass.hpp" | |
| 32 #include "oops/instanceKlass.hpp" | |
| 33 #include "oops/instanceOop.hpp" | |
| 34 #include "oops/klassKlass.hpp" | |
| 35 #include "oops/klassOop.hpp" | |
| 36 #include "oops/methodKlass.hpp" | |
| 37 #include "oops/objArrayKlass.hpp" | |
| 38 #include "oops/oop.inline.hpp" | |
| 39 #include "oops/oop.inline2.hpp" | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
40 #include "oops/symbol.hpp" |
| 1972 | 41 #include "oops/typeArrayKlass.hpp" |
| 42 #include "runtime/handles.inline.hpp" | |
| 43 #ifndef SERIALGC | |
| 44 #include "oops/oop.pcgc.inline.hpp" | |
| 45 #endif | |
| 0 | 46 |
| 47 int klassKlass::oop_size(oop obj) const { | |
| 48 assert (obj->is_klass(), "must be a klassOop"); | |
| 49 return klassOop(obj)->klass_part()->klass_oop_size(); | |
| 50 } | |
| 51 | |
| 52 klassOop klassKlass::create_klass(TRAPS) { | |
| 53 KlassHandle h_this_klass; | |
| 54 klassKlass o; | |
| 55 // for bootstrapping, handles may not be available yet. | |
| 56 klassOop k = base_create_klass_oop(h_this_klass, header_size(), o.vtbl_value(), CHECK_NULL); | |
| 57 k->set_klass(k); // point to thyself | |
| 58 // Do not try to allocate mirror, java.lang.Class not loaded at this point. | |
| 59 // See Universe::fixup_mirrors() | |
| 60 return k; | |
| 61 } | |
| 62 | |
| 63 void klassKlass::oop_follow_contents(oop obj) { | |
| 64 Klass* k = Klass::cast(klassOop(obj)); | |
| 65 // If we are alive it is valid to keep our superclass and subtype caches alive | |
| 66 MarkSweep::mark_and_push(k->adr_super()); | |
| 67 for (juint i = 0; i < Klass::primary_super_limit(); i++) | |
| 68 MarkSweep::mark_and_push(k->adr_primary_supers()+i); | |
| 69 MarkSweep::mark_and_push(k->adr_secondary_super_cache()); | |
| 70 MarkSweep::mark_and_push(k->adr_secondary_supers()); | |
| 71 MarkSweep::mark_and_push(k->adr_java_mirror()); | |
| 72 // We follow the subklass and sibling links at the end of the | |
| 73 // marking phase, since otherwise following them will prevent | |
| 74 // class unloading (all classes are transitively linked from | |
| 75 // java.lang.Object). | |
| 76 MarkSweep::revisit_weak_klass_link(k); | |
| 77 obj->follow_header(); | |
| 78 } | |
| 79 | |
| 80 #ifndef SERIALGC | |
| 81 void klassKlass::oop_follow_contents(ParCompactionManager* cm, | |
| 82 oop obj) { | |
| 83 Klass* k = Klass::cast(klassOop(obj)); | |
| 84 // If we are alive it is valid to keep our superclass and subtype caches alive | |
| 85 PSParallelCompact::mark_and_push(cm, k->adr_super()); | |
| 86 for (juint i = 0; i < Klass::primary_super_limit(); i++) | |
| 87 PSParallelCompact::mark_and_push(cm, k->adr_primary_supers()+i); | |
| 88 PSParallelCompact::mark_and_push(cm, k->adr_secondary_super_cache()); | |
| 89 PSParallelCompact::mark_and_push(cm, k->adr_secondary_supers()); | |
| 90 PSParallelCompact::mark_and_push(cm, k->adr_java_mirror()); | |
| 91 // We follow the subklass and sibling links at the end of the | |
| 92 // marking phase, since otherwise following them will prevent | |
| 93 // class unloading (all classes are transitively linked from | |
| 94 // java.lang.Object). | |
| 95 PSParallelCompact::revisit_weak_klass_link(cm, k); | |
| 96 obj->follow_header(cm); | |
| 97 } | |
| 98 #endif // SERIALGC | |
| 99 | |
| 100 int klassKlass::oop_oop_iterate(oop obj, OopClosure* blk) { | |
| 101 // Get size before changing pointers | |
| 102 int size = oop_size(obj); | |
| 103 Klass* k = Klass::cast(klassOop(obj)); | |
| 104 blk->do_oop(k->adr_super()); | |
| 105 for (juint i = 0; i < Klass::primary_super_limit(); i++) | |
| 106 blk->do_oop(k->adr_primary_supers()+i); | |
| 107 blk->do_oop(k->adr_secondary_super_cache()); | |
| 108 blk->do_oop(k->adr_secondary_supers()); | |
| 109 blk->do_oop(k->adr_java_mirror()); | |
| 110 // The following are in the perm gen and are treated | |
| 111 // specially in a later phase of a perm gen collection; ... | |
| 112 assert(oop(k)->is_perm(), "should be in perm"); | |
| 113 assert(oop(k->subklass())->is_perm_or_null(), "should be in perm"); | |
| 114 assert(oop(k->next_sibling())->is_perm_or_null(), "should be in perm"); | |
| 115 // ... don't scan them normally, but remember this klassKlass | |
| 116 // for later (see, for instance, oop_follow_contents above | |
| 117 // for what MarkSweep does with it. | |
| 118 if (blk->should_remember_klasses()) { | |
| 119 blk->remember_klass(k); | |
| 120 } | |
| 121 obj->oop_iterate_header(blk); | |
| 122 return size; | |
| 123 } | |
| 124 | |
| 125 | |
| 126 int klassKlass::oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) { | |
| 127 // Get size before changing pointers | |
| 128 int size = oop_size(obj); | |
| 129 Klass* k = Klass::cast(klassOop(obj)); | |
| 130 oop* adr; | |
| 131 adr = k->adr_super(); | |
| 132 if (mr.contains(adr)) blk->do_oop(adr); | |
| 133 for (juint i = 0; i < Klass::primary_super_limit(); i++) { | |
| 134 adr = k->adr_primary_supers()+i; | |
| 135 if (mr.contains(adr)) blk->do_oop(adr); | |
| 136 } | |
| 137 adr = k->adr_secondary_super_cache(); | |
| 138 if (mr.contains(adr)) blk->do_oop(adr); | |
| 139 adr = k->adr_secondary_supers(); | |
| 140 if (mr.contains(adr)) blk->do_oop(adr); | |
| 141 adr = k->adr_java_mirror(); | |
| 142 if (mr.contains(adr)) blk->do_oop(adr); | |
| 143 // The following are "weak links" in the perm gen and are | |
| 144 // treated specially in a later phase of a perm gen collection. | |
| 145 assert(oop(k)->is_perm(), "should be in perm"); | |
| 146 assert(oop(k->adr_subklass())->is_perm(), "should be in perm"); | |
| 147 assert(oop(k->adr_next_sibling())->is_perm(), "should be in perm"); | |
| 148 if (blk->should_remember_klasses() | |
| 149 && (mr.contains(k->adr_subklass()) | |
| 150 || mr.contains(k->adr_next_sibling()))) { | |
| 151 blk->remember_klass(k); | |
| 152 } | |
| 153 obj->oop_iterate_header(blk, mr); | |
| 154 return size; | |
| 155 } | |
| 156 | |
| 157 | |
| 158 int klassKlass::oop_adjust_pointers(oop obj) { | |
| 159 // Get size before changing pointers | |
| 160 int size = oop_size(obj); | |
| 161 obj->adjust_header(); | |
| 162 | |
| 163 Klass* k = Klass::cast(klassOop(obj)); | |
| 164 | |
| 165 MarkSweep::adjust_pointer(k->adr_super()); | |
| 166 for (juint i = 0; i < Klass::primary_super_limit(); i++) | |
| 167 MarkSweep::adjust_pointer(k->adr_primary_supers()+i); | |
| 168 MarkSweep::adjust_pointer(k->adr_secondary_super_cache()); | |
| 169 MarkSweep::adjust_pointer(k->adr_secondary_supers()); | |
| 170 MarkSweep::adjust_pointer(k->adr_java_mirror()); | |
| 171 MarkSweep::adjust_pointer(k->adr_subklass()); | |
| 172 MarkSweep::adjust_pointer(k->adr_next_sibling()); | |
| 173 return size; | |
| 174 } | |
| 175 | |
| 176 #ifndef SERIALGC | |
| 177 void klassKlass::oop_push_contents(PSPromotionManager* pm, oop obj) { | |
| 178 } | |
| 179 | |
| 180 int klassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj) { | |
| 181 Klass* k = Klass::cast(klassOop(obj)); | |
| 182 | |
| 183 oop* const beg_oop = k->oop_block_beg(); | |
| 184 oop* const end_oop = k->oop_block_end(); | |
| 185 for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) { | |
| 186 PSParallelCompact::adjust_pointer(cur_oop); | |
| 187 } | |
| 188 | |
| 189 return oop_size(obj); | |
| 190 } | |
| 191 | |
| 192 int klassKlass::oop_update_pointers(ParCompactionManager* cm, oop obj, | |
| 193 HeapWord* beg_addr, HeapWord* end_addr) { | |
| 194 Klass* k = Klass::cast(klassOop(obj)); | |
| 195 | |
| 196 oop* const beg_oop = MAX2((oop*)beg_addr, k->oop_block_beg()); | |
| 197 oop* const end_oop = MIN2((oop*)end_addr, k->oop_block_end()); | |
| 198 for (oop* cur_oop = beg_oop; cur_oop < end_oop; ++cur_oop) { | |
| 199 PSParallelCompact::adjust_pointer(cur_oop); | |
| 200 } | |
| 201 | |
| 202 return oop_size(obj); | |
| 203 } | |
| 204 #endif // SERIALGC | |
| 205 | |
| 206 | |
| 207 // Printing | |
| 208 | |
| 209 void klassKlass::oop_print_on(oop obj, outputStream* st) { | |
| 210 Klass::oop_print_on(obj, st); | |
| 211 } | |
| 212 | |
| 213 void klassKlass::oop_print_value_on(oop obj, outputStream* st) { | |
| 214 Klass::oop_print_value_on(obj, st); | |
| 215 } | |
| 216 | |
| 217 const char* klassKlass::internal_name() const { | |
| 218 return "{other class}"; | |
| 219 } | |
| 220 | |
| 221 | |
| 222 // Verification | |
| 223 | |
| 224 void klassKlass::oop_verify_on(oop obj, outputStream* st) { | |
| 225 Klass::oop_verify_on(obj, st); | |
| 226 guarantee(obj->is_perm(), "should be in permspace"); | |
| 227 guarantee(obj->is_klass(), "should be klass"); | |
| 228 | |
| 229 Klass* k = Klass::cast(klassOop(obj)); | |
| 230 if (k->super() != NULL) { | |
| 231 guarantee(k->super()->is_perm(), "should be in permspace"); | |
| 232 guarantee(k->super()->is_klass(), "should be klass"); | |
| 233 } | |
| 234 klassOop ko = k->secondary_super_cache(); | |
| 235 if( ko != NULL ) { | |
| 236 guarantee(ko->is_perm(), "should be in permspace"); | |
| 237 guarantee(ko->is_klass(), "should be klass"); | |
| 238 } | |
| 239 for( uint i = 0; i < primary_super_limit(); i++ ) { | |
| 240 oop ko = k->adr_primary_supers()[i]; // Cannot use normal accessor because it asserts | |
| 241 if( ko != NULL ) { | |
| 242 guarantee(ko->is_perm(), "should be in permspace"); | |
| 243 guarantee(ko->is_klass(), "should be klass"); | |
| 244 } | |
| 245 } | |
| 246 | |
| 247 if (k->java_mirror() != NULL || (k->oop_is_instance() && instanceKlass::cast(klassOop(obj))->is_loaded())) { | |
| 248 guarantee(k->java_mirror() != NULL, "should be allocated"); | |
| 249 guarantee(k->java_mirror()->is_perm(), "should be in permspace"); | |
| 250 guarantee(k->java_mirror()->is_instance(), "should be instance"); | |
| 251 } | |
| 252 } |